docs: def find_perf_iops_price(package, size, iops):
      """Find the price in the given package with the specified size and iops
  
      :param package: The Performance product package
      :param size: The size of storage space for which an IOPS price is desired
      :param iops: The number of IOPS for which a price is desired
      :return: Returns the price for the size and IOPS, or an error if not found
      """
      for item in package['items']:
          if int(item['capacity']) != int(iops):
              continue
  
          price_id = _find_price_id(item['prices'], 'performance_storage_iops', 'STORAGE_SPACE', size)
          if price_id:
              return price_id
  
      raise ValueError("Could not find price for iops for the given volume")